Are you looking for suggestions on length/width combos or actual brands of bars and stems?
What is your current bar length?
I like your change from 90 to 65 on stem and 750mm bars is a nice wide. Depending on your riding style and terrain, the exact length/width combo is pretty personal, but after going shorter + wider, I don’t see going longer than a 65mm stem or narrower than a 760mm bar in the foreseeable future. My set up right now is 50 stem + 777mm bar (Spank Oozy + Spank Spike Vibrocore). The best way to determine what’s best IMO is to pick a stem length that is 20-30mm shorter than what you currently have which is what you have in a 65 stem. The bar is easier… get a long one, like 780-800mm. Ride, trim, ride, trim etc until you settle on a width you’re happy with.
As far as brands, I like my Deity Blacklabel and Spank Spike. Both alloy. My next bars will be Chromag because they look sick and come in some cool colors. Renthals are nice but too burly for me.
My Spank Oozy stem is pretty slick… I’ve really liked Thomson stems. Can’t go wrong with Race Face Atlas. Also check out Chromag Ranger and Deity Cavity. These are all trail-type stems with lengths in the 35-66mm range.
I have no good advice on grips, but ride ODI TLD lock ons which I like, but may go back to something less burly.